Patents by Inventor David B. Richardson

David B. Richardson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Local area network transmission emulator
    Patent number: 5577033
    Abstract: A method and apparatus for using switched telecommunications services to emulate a local area network (LAN) medium. The method and apparatus convert a public switched network or an equivalent private network into a LAN cabling method for connecting distant devices using the same communications software as used in traditionally wired LANs.
    Type: Grant
    Filed: June 3, 1994
    Date of Patent: November 19, 1996
    Assignee: Microcom Systems, Inc.
    Inventors: Eugene Y. Chang, David B. Richardson, Bennett C. Baker
  • Method and apparatus for reducing the transmission of repetitive broadcast datagrams over communication links
    Patent number: 5539745
    Abstract: The invention relates to a method and apparatus for reducing the flow of repetitive broadcast datagrams over a communication link between two local area networks while still maintaining reception of all of the repetitive broadcast datagrams generated and intended by one of the local area networks for transmission to the other local area network over the communication link. The reduction, which can be to zero, occurs for intermittent periods of time having various durations.
    Type: Grant
    Filed: June 7, 1994
    Date of Patent: July 23, 1996
    Assignee: Microcom Systems, Inc.
    Inventors: Eugene Y. Chang, David B. Richardson, Bennett C. Baker
  • Local area network transmission emulator
    Patent number: 5323388
    Abstract: A method and apparatus for using switched telecommunications services to emulate a local area network (LAN) medium. The method and apparatus convert a public switched network or an equivalent private network into a LAN cabling method for connecting distant devices using the same communications software as used in traditionally wired LANs.
    Type: Grant
    Filed: July 27, 1993
    Date of Patent: June 21, 1994
    Assignee: Extension Technology Corp.
    Inventors: Eugene Y. Chang, David B. Richardson, Bennett C. Baker
  • Method and apparatus for reducing the transmission of repetitive braodcast datagrams over communication links
    Patent number: 5321694
    Abstract: The invention relates to a method and apparatus for reducing the flow of repetitive broadcast datagrams over a communication link between two local area networks while still maintaining reception of all of the repetitive broadcast datagrams generated and intended by one of the local area networks for transmission to the other local area network over the communication link. The reduction, which can be to zero, occurs for intermittent periods of time having various durations.
    Type: Grant
    Filed: February 9, 1993
    Date of Patent: June 14, 1994
    Assignee: Extension Technology Corporation
    Inventors: Eugene Y. Chang, David B. Richardson, Bennett C. Baker
  • Local area network transmission emulator
    Patent number: 5280481
    Abstract: A method and apparatus for using switched telecommunications services to emulate a local area network (LAN) medium. The method and apparatus convert a public switched network or an equivalent private network into a LAN cabling method for connecting distant devices using the same communications software as used in traditionally wired LANs.
    Type: Grant
    Filed: September 20, 1991
    Date of Patent: January 18, 1994
    Assignee: Extension Technology Corp.
    Inventors: Eugene Y. Chang, David B. Richardson, Bennett C. Baker